Fan-case for acid-flues.



No. 798,100. PATENTED AUG. 29, 1905.

N. L. HEINZ.

FAN CASE FOR AGIDPLUES.

APPLICATION nmm AUG. 29, 1904.

R i ll NICHOLAS L. HEINZ, OF LASALLE, ILLINOIS.

' FAN-CASE FOR AClD-FLUES.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application filed August 29,1904. Serial No. 222,595.

To all whom it may concern.-

Be it known that I, NIcHoLAs L. HEINZ, of Lasalle, in the county of Lasalle and State of Illinois, have invented certain new and useful Improvements in Fan-Cases for Acid-Flues, of which the following is a specification.

This invention relates to cases for fans made of lead as an acid-resisting material in flues for the transmission of sulfuric-acid fumes; and the objects of the improvement are, first, to provide a casing for the fan with opposite inlet-openings at the center around the fanshaft and an outlet-opening at the periphery, the inlets and the outlet being in connection with the flue; second, to provide such casing in separable parts united at the horizontal plane which contains the axis of rotation of the fan by means of a liquid seal in such manner as to exclude the escape of gas at the junction of the parts and facilitate their ready separation for the removal of the fan and its shaft from the casing, and, third, to provide a suitable frame in connection with the upper part of the casing for lifting it off of the lower part and replacing it upon the same. I have attained these objects by the casing and its connecting parts constructed as illustrated in the accompanying drawings, in Which Figure 1 is a side elevation of such contrivance containing my invention. Fig. 2-is a top or plan view, partly in section. Fig. 3 is a detail showing a transverse section through the seal at the junction of the separable parts of the casing.

As shown in the drawings, the fan-casing is made in upper and lower separable parts A A, which are provided at the center with projections A A respectively, on each side around the shaft, the two parts A A being of semicircular contour and adapted to fit together and form a circular chamber to cover the fan and having opposite extensions at the centralportions within the projections A A to cover a portion of the shaft each side of the fan. The separable parts come together squarely at a horizontal plane containing the axis of rotation of the fan at the line 2 2 of Figs. 1 and 3. The projections are provided with an opening a for the fan-shaft B, which opening is formed by a recess in each half of the projections fitting on the shaft, and may have journal-boxings a.

The upper part A of the casing and of the part A thereof is provided with an inverted- L flange (0 as illustrated in Fig. 3, which extends all the way around from the journalboxing on one side to the journal-boxing on the opposite side, and the lower part A, including the part A thereof, has a reversed- L flange a similarly extended, around which, with the upper margin of the casing, forms a trough down into which the inverted L flange extends. The recesses a or journalboxings are lined with babbitt metal or gastight packing around the shaft, and the parts of the casing are thereby secured in proper relative position to one another by the shaft, and a-gas-tight closing between the parts is made by filling the trough with a suitable liquid. No gas will escape at the recesses a around the shaft by reason of suction of the fan at these points. The parts of the casing may be separated by lifting the upper part from the lower part. The flue 0, leading to the casing, is branched at C and connected to the part A on each side of the casing, so that the fumes drawn in by the lead fan D enter at both sides of the casing and are forced out through the other part of the flue C connected with the periphery of the casing and leading therefrom. V

The upper part of the casing is provided with a frame E, connected by means of rods 6 and having a centrally-located eye or hook e, by means of which a cable from a lifting-pulley supported from above (but not shown) may be attached for lifting it ofi of the lower part to any desired height in order to remove the fan and its shaft and substitute a new shaft and fan with little or comparatively no delay in the working of the flue. All that is required to enable the parts of the casing to be thus separated is to lift up the top part. Lead fans will not stand under as high speed as fans of stronger metal, and on this account the casing must be so constructed and connected with the transmitting-flue as to take in the acid-fumes through both sides of the casing.

Separable fan-cases connected at one end of a flue have been made with angle-plates at the line of separation and held together by a row of bolts extending the, greater portion of the way around the casing. Bolts do not hold well and are continuously leaking.

It is the aim of my invention to provide a casing in conjunction with an acid-flue leading to and from the casing and so connected therewith as to admit the contents of the flue to the fan at opposite sides of the casing, to make the casing in sections separable at a horizontal plane containing the axis of rotation, to secure the parts, the bottom to stand alone and the top being held by a few rods connecting it with its frame and resting on the shaft and bottom, to render the junction airtight at other points than-the shaft by means of a liquid seal, and to provide the upper, part made separable at a horizontal plane containing the axis of rotation of the shaft and being provided with a liquid seal at the plane of separation, and a conduit-flue having a part provided with branches connected with the opposite projections of the casing below the plane .of separation and a part connected with the body of the casing at the periphery and below the plane of separation as specified.

NICHOLAS L. HEINZ.

Witnesses ROBT. (J. WELTER,

HEINZ. 

